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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Contains and regulates the temp of the testes for sperm production






2. Days which have increasing daylight hours

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3. Can survive ~7 days in cow. vast majority <48 hours






4. Days which have increasing daylight hours

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5. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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6. Microscopic - make sure not sterile - very few bulls are actually tested






7. Look for infection - split - and rupture of the penis






8. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






9. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






10. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






11. 14-19 (17) days






12. When are dairy cattle dehorned?






13. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






14. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






15. Sperm production






16. Provide nourishment for the developing sperm






17. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






18. Allows extension of penis without fibro-elastic penis






19. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






20. To remove/separate testicles from animal's body before animal reaches puberty






21. Scar tissue plugs up chambers of udder






22. Way to know everything is alright with the breeding male






23. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






24. (FSH) causes egg to mature in females






25. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






26. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






27. 114 days






28. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






29. 1. brain function - 2. blood flow - 3. willing female






30. Why Dairy calves are fed powdered milk.






31. Urinary calculi.






32. (FSH) causes egg to mature in females






33. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






34. 1-3 days






35. Why does estrus happen before ovulation?






36. Duct through penis that carries sperm and urine






37. 16-20 hours






38. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






39. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






40. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






41. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






42. ~305 days (altough often longer due to breeding difficulties)






43. What helps regulate spermatogenesis?






44. 336 days






45. Produce testosterone. located between the seminiferous tubules






46. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






47. 45-60 days after breeding; re-breed as required






48. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






49. (LH) stimulates the Leydig cells to produce testosterone






50. 283 days